In part, the disclosure relates to methods of treating fibrotic cancers by administering one or more Serum Amyloid Protein (SAP) agonists. In certain aspects, the method further comprises the conjoint administration of an anti-cancer therapeutic, e.g., a chemotherapeutic agent. In certain aspects, the disclosure relates to methods of treating myelofibrosis by administering an SAP agonist and optionally one or more anti-cancer therapeutic agents.